P0B66

Hybrid/EV Battery Voltage Sense I Circuit High

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
The hybrid system goes into emergency mode
Reduced vehicle power
Battery charging problems
The car may not start

Causes

Battery voltage sensor fault
Damage to the sensor circuit wiring harness
Short circuit in the circuit
Battery control unit malfunction
Problems with high voltage battery

How to Fix

Check the condition of the high-voltage battery
Check the integrity of the wiring harness and connections
Check voltage sensor readings
Test the battery control unit
Replace faulty components

Related codes

P0B65 P0B67 P0A80